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Program to covert a given decimal number into Roman Code

Posted By: Easy Tutor     Category: C++ Programming     Views: 5446

A C++ Program to covert a given decimal number into Roman Code.

Code for Program to covert a given decimal number into Roman Code in C++ Programming

 # include <iostream.h>
 # include <iomanip.h>
 # include <conio.h>
 # include <math.h>

 void roman_code(longint);


 main( )
    {
       clrscr( );

       double number;

       cout<<"\n******************************************************************************"<<endl;
       cout<<"******************************************************************************"<<endl;
       cout<<"------------------------------------------------------------------------------"<<endl;
       cout<<"\n******  Conversion of a number from Decimal Number System to Roman Code  *****"<<endl;
       cout<<"\n------------------------------------------------------------------------------"<<endl;
       cout<<"******************************************************************************"<<endl;
       cout<<"******************************************************************************"<<endl;

       gotoxy(1,22);
       cout<<"------------------------------------------------------------------------------"<<endl;
       cout<<"******************************************************************************"<<endl;
       cout<<"******************************************************************************";

       gotoxy(1,10);
       cout<<"\n\n ***  Enter the Decimal Number from ( -1000,0,00,000 --> +1000,0,00,000 )  ***\n\n\n"<<endl;
       cout<<setw(21)<<"Decimal Number ::  ";
       cin>>number;

       if(number==0)
      cout<<"\n\n  Error ::  The given Decimal Number doesn't exists in Roman Number System.";

       elseif((number>1000000000) || (number<-1000000000))
      cout<<"\n\n  Error ::  The given Decimal Number is out of range.";

       else
      {
         cout<<"\n\n  Roman Code  ::   "<<endl;

         gotoxy(19,19);
         roman_code(number);
      }

       getch( );

       return 0;
    }

 /*************************************************************************//*************************************************************************///------------------------  Function Definitions  -----------------------///*************************************************************************//*************************************************************************//*************************************************************************///-----------------------  roman_code(long int)  ------------------------///*************************************************************************/void roman_code(longint number)
    {
       long number_1;
       long number_2;
       long number_3;
       long number_4;
       long number_5;
       long number_6;
       long number_7;
       long number_8;
       long number_9;
       long number_10;
       long number_11;
       long number_12;
       long number_13;
       long number_14;
       long number_15;
       long number_16;
       long number_17;
       long number_18;

       number_1=fabs(number);
       number_2=number_1%1000000000;
       number_3=number_2/100000000;
       number_4=number_2%100000000;
       number_5=number_4/10000000;
       number_6=number_4%10000000;
       number_7=number_6/1000000;
       number_8=number_6%1000000;
       number_9=number_8/100000;
       number_10=number_8%100000;
       number_11=number_10/10000;
       number_12=number_10%10000;
       number_13=number_12/1000;
       number_14=number_12%1000;
       number_15=number_14/100;
       number_16=number_14%100;
       number_17=number_16/10;
       number_18=number_16%10;

       if(number<0)
      cout<<"- ";

       switch(number_3)
      {
         case 1 : cout<<"C ";
              break;

         case 2 : cout<<"CC ";
              break;

         case 3 : cout<<"CCC ";
              break;

         case 4 : cout<<"CD ";
              break;

         case 5 : cout<<"D ";
              break;

         case 6 : cout<<"DC ";
              break;

         case 7 : cout<<"DCC ";
              break;

         case 8 : cout<<"DCCC ";
              break;

         case 9 : cout<<"CM ";
              break;
      }

       switch(number_5)
      {
         case 1 : cout<<"X ";
              break;

         case 2 : cout<<"XX ";
              break;

         case 3 : cout<<"XXX ";
              break;

         case 4 : cout<<"XL ";
              break;

         case 5 : cout<<"L ";
              break;

         case 6 : cout<<"LX ";
              break;

         case 7: cout<<"LXX ";
             break;

         case 8: cout<<"LXXX ";
             break;

         case 9: cout<<"XC ";
             break;
      }

       switch(number_7)
      {
         case 9 : cout<<"IX" ;
              break;

         case 8 : cout<<"VIII ";
              break;

         case 7 : cout<<"VII ";
              break;

         case 6 : cout<<"VI ";
              break;

         case 5 : cout<<"V ";
              break;

         case 4 : cout<<"IV ";
              break;

         case 3 : cout<<"III ";
              break;

         case 2 : cout<<"II ";
              break;

         case 1 : cout<<"I ";
              break;
      }

       if(number_1>999999)
      {
         gotoxy(24,9);
         cout<<"_";

         gotoxy(24,10);
         cout<<"M ";
      }

       switch(number_9)
      {
         case 1 : gotoxy(27,9);
              cout<<"_";

              gotoxy(27,10);
              cout<<"C ";

              break;

         case 2 : gotoxy(27,9);
              cout<<"__";

              gotoxy(27,10);
              cout<<"CC ";

              break;

         case 3 : gotoxy(27,9);
              cout<<"___";

              gotoxy(27,10);
              cout<<"CCC ";

              break;

         case 4 : gotoxy(27,9);
              cout<<"__";

              gotoxy(27,10);
              cout<<"CD ";

              break;

         case 5 : gotoxy(27,9);
              cout<<"_";

              gotoxy(27,10);
              cout<<"D ";

              break;

         case 6 : gotoxy(27,9);
              cout<<"__";

              gotoxy(27,10);
              cout<<"DC ";

              break;

         case 7 : gotoxy(27,9);
              cout<<"___";

              gotoxy(27,10);
              cout<<"DCC ";

              break;

         case 8 : gotoxy(27,9);
              cout<<"____";

              gotoxy(27,10);
              cout<<"DCCC ";

              break;

         case 9:  gotoxy(27,9);
              cout<<"__";

              gotoxy(27,10);
              cout<<"CM ";

              break;
      }

       switch(number_11)
      {
         case 1 : gotoxy(32,9);
              cout<<"_";

              gotoxy(32,10);
              cout<<"X ";

              break;

         case 2 : gotoxy(32,9);
              cout<<"__";

              gotoxy(32,10);
              cout<<"XX ";

              break;

         case 3 : gotoxy(32,9);
              cout<<"___";

              gotoxy(32,10);
              cout<<"XXX ";

              break;

         case 4 : gotoxy(32,9);
              cout<<"__";

              gotoxy(32,10);
              cout<<"XL ";

              break;

         case 5 : gotoxy(32,9);
              cout<<"_";

              gotoxy(32,10);
              cout<<"L ";

              break;

         case 6 : gotoxy(32,9);
              cout<<"__";

              gotoxy(32,10);
              cout<<"LX ";

              break;

         case 7 : gotoxy(32,9);
              cout<<"___";

              gotoxy(32,10);
              cout<<"LXX ";

              break;

         case 8 : gotoxy(32,9);
              cout<<"____";

              gotoxy(32,10);
              cout<<"LXXX ";

              break;

         case 9 : gotoxy(32,9);
              cout<<"__";

              gotoxy(32,10);
              cout<<"XC ";

              break;
      }

       switch(number_13)
      {
         case 1 : cout<<"M ";
              break;

         case 2 : cout<<"MM ";
              break;

         case 3 : cout<<"MMM ";
              break;

         case 4 : gotoxy(37,9);
              cout<<"_";

              gotoxy(37,10);
              cout<<"MV ";

              break;

         case 5 : gotoxy(37,9);
              cout<<"_";

              gotoxy(37,10);
              cout<<"V ";

              break;

         case 6 : gotoxy(37,9);
              cout<<"_";

              gotoxy(37,10);
              cout<<"VM ";

              break;

         case 7 : gotoxy(37,9);
              cout<<"_";

              gotoxy(37,10);
              cout<<"VMM ";

              break;

         case 8 : gotoxy(37,9);
              cout<<"_";

              gotoxy(37,10);
              cout<<"VMMM ";

              break;

         case 9 : gotoxy(37,9);
              cout<<"_";

              gotoxy(37,10);
              cout<<"MX ";

              break;
      }

       switch(number_15)
      {
         case 1 : cout<<"C ";
              break;

         case 2 : cout<<"CC ";
              break;

         case 3 : cout<<"CCC ";
              break;

         case 4 : cout<<"CD ";
              break;

         case 5 : cout<<"D ";
              break;

         case 6 : cout<<"DC ";
              break;

         case 7 : cout<<"DCC ";
              break;

         case 8 : cout<<"DCCC ";
              break;

         case 9: cout<<"CM ";
             break;
      }

       switch(number_17)
      {
         case 1 : cout<<"X ";
              break;

         case 2 : cout<<"XX ";
              break;

         case 3 : cout<<"XXX ";
              break;

         case 4 : cout<<"XL ";
              break;

         case 5 : cout<<"L ";
              break;

         case 6 : cout<<"LX ";
              break;

         case 7 : cout<<"LXX ";
              break;

         case 8 : cout<<"LXXX ";
              break;

         case 9 : cout<<"XC ";
              break;
      }

       switch(number_18)
      {
         case 9 : cout<<"IX";
              break;

         case 8 : cout<<"VIII";
              break;

         case 7 : cout<<"VII";
              break;

         case 6 : cout<<"VI";
              break;

         case 5 : cout<<"V";
              break;

         case 4 : cout<<"IV";
              break;

         case 3 : cout<<"III";
              break;

         case 2 : cout<<"II";
              break;

         case 1 : cout<<"I";
              break;
      }
    }
  
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Easy Tutor author of Program to covert a given decimal number into Roman Code is from United States. Easy Tutor says

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